How Long Does LEGO® 4.5V Motor Set (901) Take to Build?

A typical builder finishes LEGO® 4.5V Motor Set (set 901, 31 pieces) in about 5 minutes.

PieceTick estimates build time from piece count, part complexity, the set’s age rating, your experience level, and how you sort pieces. Adjust those on this page for an estimate matched to how you build.